A process study of electron beam nano-lithography and deep etching with an ICP system

A systemic process study on an electron beam nanolithography system operating at 100 kV was present. The exposure conditions were optimized for resist ZEP520A. Grating structures with line/space of 50 nm/50 nm were obtained in a reasonably thick resist which is beneficial to the subsequent pattern transfer technique. The ICP etching process conditions was optimized. The role of etching parameters such as source power, gas pressure, and gas flow rate on the etching result was also discussed. A grating structure with line widths as small as 100 nm, duty cycles of 0.5, depth of 900 nm, and the side-wall scalloping as small as 5 nm on a silicon substrate was obtained. The silicon deep etching technique for structure sizes smaller than 100 nm is very important for the fabrication of nano-optical devices working in the visible regime. Supported by the National Basic Research Program of China (“973” Program) (Grant No. 2007CB935301)     

基于3G传输网络的道路气象预警系统

利用传感技术为监测手段开发一套基于3G传输网络的道路气象预警系统,使道路管理部门精确掌握气象资料和天气预报,并根据各路段的地形及气候特点,结合路段交通状况,制定各自的应急预案,以保证道路的行车安全和顺畅。此系统对道路沿线气象状况进行监测、分析并采取有效的应急预案,对保障道路过往车辆和人身财产安全有着积极作用。     

Interfacial adhesion reaction of polyethylene and starch blends using maleated polyethylene reactive compatibilizer

The interfacial reaction of the polyethylene (PE)/starch blend system containing the reactive compatibilizer maleated polyethylene (m‐PE) was directly characterized by Fourier transform infrared (FTIR) spectroscopy. A significant amount of anhydride groups on m‐PE existed as hydrolyzed forms, resulting in a large amount of carboxyl groups. Using a vacuum‐heating‐cell designed in the laboratory, the carboxyl groups were successfully transformed into the dehydrolyzed state (i.e., anhydride group). This result enabled the direct spectroscopic observation of chemical reaction occurring at the interface. For the PE/starch blend system containing m‐PE, the chemical reaction at the interface was verified by the evolution of ester and carboxyl groups in the FTIR spectra. The effect of the reactive compatibilizer on the interfacial morphology was also examined by scanning electron micrography (SEM). Enhanced interfacial adhesion was clearly observed for the blend system containing reactive compatibilizer. Tensile strengths of blend systems containing m‐PE also increased noticeably compared with the corresponding system without compatibilizer. A similar observation was made for the breaking elongation data. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 767–776, 2002     

快充纯电动BRT运营效果评价方法

针对快充纯电动快速公交(bus rapid transit,BRT)系统的运营效果评价问题,提出基于快充纯电动公交车辆运行特性与BRT运营特点的评价方法.首先,分析快充纯电动公交车辆在BRT中的适用性,从运营车辆性能、设施水平、乘客服务水平、经济效益等角度出发,建立包含燃油车辆替换率、动力电池衰减率、充电设施供需平衡关系等9项细化指标的快充纯电动BRT运营效果评价指标体系;其次,采用灰色聚类方法,构建快充纯电动BRT运营效果评价模型;最后,以金华市国内首条纯电动BRT线路为例,进行运营效果评价.与实际运营情况调查结果对比后发现,相比传统BRT运营效果评价方法,该方法更能真实、有效地反映纯电动BRT的实际运营效果.     

一类修正的q-Baskakov算子的逼近性质

Baskakov型算子是研究函数逼近问题的一种很重要的工具。该文基于Gupta所提出的q-Baskakov算子,介绍了一类修正的q-Baskakov算子,给出了该类算子的一些基本性质,并且得到了该类算子的一致收敛定理,从而进一步推广了q-Baskakov算子的一些结论。     

不同体育锻炼项目对大学生心理韧性的影响

采用问卷法对承德某高校学生进行调查,对选修不同体育锻炼项目课程学生的心理韧性情况进行统计分析,结果表明：选修篮球、足球、现代舞项目学生的心理韧性要显著优于选修太极项目的学生;选修对抗性项目学生在心理韧性显著优于非对抗性项目;课余锻炼量较大的学生心理韧性最好。     

模块化高校公寓多功能家具人机尺度研究

目的为科学合理地对家具设计提供适宜的尺寸,从人机角度对其在多功能性设计中展开探讨,提出符合当代大学生适用的多功能家具方案．方法以家具产品的物理属性分析和模块化思维为基础,结合人机工程学理论,对现有学生公寓家居设计进行数据分析和评价并得出理想的人机尺寸及具有设计美感的新型设计方案．结果多功能性学生公寓家具书桌最佳高度为680—760mm、书桌宽度为800mm;男女通用座高为400～420mm、座椅倾斜度为3°-4°、座深为380mm、座椅扶手宽度为65—70mm;床面长度增加至2020mm、床面宽度为900-1000mm;储物柜长宽为500mm×600mm．结论笔者结合实际模拟设计出了一套符合学生生活、学习、会客、娱乐等多种功能需求的方案,为学生公寓设计提供新的数据依据．     

纳米金修饰的微柱型微流控芯片用于循环肿瘤细胞检测

设计并制作了微柱型聚二甲基硅氧烷(PDMS)微流控芯片,并在通道表面组装纳米金,固定上皮细胞粘附因子(EpCAM)抗体后用于循环肿瘤细胞(Circulating Tumor Cell,CTC)检测。结果表明,纳米金成功组装在γ-氨丙基三乙氧基硅烷硅烷化的PDMS微柱表面,EpCAM抗体功能化的微流控芯片能有效捕获全血中的模型CTCs,当流速小于40μL/min时,捕获效率大于90%。建立一种简单廉价、捕获效率高的CTCs检测新方法,有望为全血中CTCs的分离提供新的策略。     

Fe3O4@TiO2@SiO2@Ag光催化剂的制备及其光催化活性研究

采用溶剂热法和溶胶-凝胶法合成了磁性Fe₃O₄@TiO₂@SiO₂复合光催化剂,再通过巯基改性,使二氧化硅表面原位合成银纳米颗粒,最终形成目标光催化剂。利用XRD、FT-IR、XPS、SEM、VSM等分析测试手段对该催化剂的组成、结构、形貌及其磁学性能进行表征。通过光催化降解40 mL罗丹明B溶液(pH 5.3,30 mg/L),催化剂按1 g/L加入反应体系,光照120 min时,罗丹明B溶液的降解率达96.22%。相同条件重复循环实验10次,罗丹明B溶液降解率仅下降4.32%,表明Fe₃O₄@TiO₂@SiO₂@Ag磁性光催化剂具有出色的光催化活性和循环使用性。     

德国雷姆公司的MEGAPULS系列数控双脉冲焊机的特点

德国雷姆焊接技术有限公司是专业生产MIG／MAG气体保护焊机、TIG焊机和等离子切割机的专业公司，拥有100多名员工。其中设计人员近30名，约占公司人员总数的25％。该公司十分重视产品的技术进步和技术创新工作，因此，产品技术升级换代的循环周期比较短。